PhilG
Free Member
Todays engineering tolerances and fine machining techniques means running in doesnt include speed....only variable engine loading.
acceleration (but not harsh) to legal speed limits , hill climbing using the gearbox etc.. ...but do not labour the engine.
You could sit at 70mph in top gear all day and it still wont get properly run in.
When was the last time you saw a bit of cardboard with the words
RUNNING IN..PLEASE PASS in the rear window of a vehicle ?
Never !